Two kinds of heat treatment deformation of S235J2W steel plate

S235J2W steel plate must be quenched in the process of manufacturing. Sometimes, due to poor technology, S235J2W steel plate is often deformed due to too high and too low heat. In this case, we need to find out the reasons and methods.

There are two types of heat treatment deformation of S235J2W steel plate: one is the change of size, the other is the change of part geometry. Different heat treatment processes have different deformation and anti deformation methods for the size and geometry of S235J2W steel plate.

Generally speaking, the martensite shrinkage of S235J2W steel plate is proportional to the content of supersaturated carbon when tempered at low temperature. When heated at room temperature -200, some residual austenite will transform into martensite and expand. However, due to the decomposition of martensite near 200, the expansion of S235J2W steel plate has almost no change.